SMPPT Installation & Operation Manual Version 1.0
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Figure 2-5: Voltage-Power Curve
3. PV System Planning Reference
3.1 System Voltage
The common system voltage of solar system has 3 types: 12V, 24V and 48V.
The higher the system voltage, the more power the system can handle. In
reality application, user should consider the load power, and the voltage scope
permitted by load, and then confirms which system voltage you should use.
The power range for each system voltage is as follows:
System Voltage
Recommended Power Range
12V
＜
800W
24V
＜
2000W
48V
＜
6000W
Table 3-1: System voltage vs. Power range
3.2 Solar Modules Configuration
SMPPT Series controller can be connected with Single Crystalline Silicon
solar panels and also Thin-film solar panels. When configuring the system,
make sure the open circuit voltage of solar panels array is not higher than the
maximum voltage permitted by the controller. Table 3-2 introduces the models
of Single Crystalline Silicon solar panels and Thin-film solar panels and their
parameters. Table 3-3 shows the configuration solution for 12V, 24V and 48V
system for solar panels.
